Orchard heater



R. PETER ORCHARD HEATER April 9, 1929.

Filed Sept. 6, 1927 SECTION 8-8 INVENTOR Patented Apr. 9, 1929.

UNITED STATES PATENT OFFICE.

RUDOLPH PETER, OF SAN JOSE, CALIFORNIA.

ORCHARD HEATER.

This invention refers to orchard heaters of the oil burning'type and hasto do with vent arrangement and specific stack-construction.

The objects of the improvements are to provide a better combustion andavoidance of draft trouble caused by wind.

In the drawings Fig. 1 is a vertical section of a complete orchardheater made in accordance with my invention.

Fig. 2 is a plan view of the wind shield thereof.

Fig. 3 is an enlarged sectional detail of a modification in formation ofthe special vents in the base of the stack; and Fig. 4 is a crosssection of a portion of the stack con structed as per Fig. 3 broken awayto show the form at AA and BB of Fig.3.

In the drawings 1 is an oil pot as indicated. The pot is provided with acover 2 -fitting tightly thereover and having an upstanding neck 3 overwhich a stack is mounted, While upon the cover is arranged one -or moreadjustable air vents and filling opening as at 4. The oil whenignitedburns principally in the stack.-

The stack comprises two stove pipe sections 5 and 6 of conical form andjoined to lower section.

gethcr at their large diameters preferably by a simple telescopic jointas at 7.

The-proportionate areas of the stack sections is important, the diameterof the top of the upper section being somewhat larger than the diameterof the lower end of the Around the base of the lower section are severalrows of vents 8, 9, 1O staggered one above the other as indicated. Thesevents may be formed by cutting and bending small flaps or cars of themetal inward as indicated at 8, 9' and 10' or may be formed as shown inFigs. 3 and 4 to be later described.

In either construction the lower vents 8 are relatively large elongatedopenings while the vents 9 and 10 are very'narrow slits as shown andstaggered in vertical relation toone another as clearly shown in Figs. 1and 4.

Around the lower part of the stack is a curved U shaped sheet metal Windshield 11 forming a space or channel around the stack open on the endsof the U for wind blowing in one general direction toward the stack.

- This U shaped guard rests upon the cover 2 of the oil pot and isretained in place around the stack by awire 12 passing from one leg ofthe U to the other and which wire holds the shield in place on the stackso that the shield may be revolved to point in any direction so that itmay be set to catch the prevailing wind.

In Figs. 3 and 4 a variation in construction of the lower end of thestack is shown and in which the stack 5 is formed with steps 13, 14, 15with vents 13, 14, 15' passing through the steps. Vents 13' and 14 arethe narrow slits while vents 15 are the lower large vents correspondingto the large vents 8 of Fig. 1.

Steps or shoulders 13 and 14 being .rela tively small may be rolled intothe metal of the stack section 5, but step 15 is best made on a separatesection 5" formed with outwardly bent ears 16 into which downwardlyextending cars 17 of section 5'extend.

Ears 16 are preferably notched at XX (see Fig. 4) so that ears 17 willinterlock in sliding section 5' vertically downward into position.

The special shape of the stack comprising a pair of cones joined attheir bases, and the arrangement of vents with staggered small slit-likevents above the larger openings, together With the larger diameter ofthe top of the stack over the extreme lower end has been found afterexperiments with a greatvariety of forms. to result in a perfectcombustion not otherwise attainable, and the shield 11 makes thecombustion uniform at all sides of the stack as it prevents the forma-.pot surmounted by a stack, said stack comprising two frusto-conicalsections directly ]01I11I1g at their large ends and with a small endconnected to the pot and a small end at the extreme top of the stack oflarger diameter than the extreme lower end of the lower section.

2. An orchard heater comprising an oil -pot surmounted by a stack, saidstack comout its perforated length.

3. An orchard heater comprising an oil pot surmounted by a stack, saidstack comprising two frusto-conical sections connected at their largeends and with a small end connected to the pot, a plurality of rows ofair vents formed around the base of the lower section of the stack only,comprising transverse slits in the stack with the wall of the stack bentinwardly below each slit and slanting downwardly and outwardly.

4. In an orchard heater of the character described, a stack, a series ofvents around the stack, and a shield around portion of ghe vents andstack spaced outwardly thererom.

5. In an orchard heater of the character described, a stack, a series ofvents around the stack, and a shield around portion of the Vents andstack spaced outwardly therefrom and open on one side for admission oflateral air currents.

6. In an orchard heater of the character described, a stack, a series ofvents around the stack, and a shield around portion of the vents andstack spaced outwardly therefrom, said shield comprising a U-shapedsheet provided with means holding it in place around the stack.

7 In an orchard heater of the character described, a stack, aseries ofvents around the stack, and a, shield around portion of the vents andstack spaced outwardly therefrom, said shield comprising a U-shapedsheet provided with means holding it in place around the stack, and theshield being revolvable around the stack for directing the legs of the Uin various directions.

RUDOLPH PETER.

